Not able to add repositories

I'm trying to add repositories, but I can only add those from github which have the "open in home assistant" (blue) button. Whenever I try to add from within HA app by copying & pasting, it shows me an error message like this. Though the button on some github repos is doing the same thing, like letting HA app grab the link automatically. I'm not sure what am I doing wrong here?

I'm trying to add repositories, but I can only add those from github which have the "open in home assistant" (blue) button. Whenever I try to add from within HA app by copying & pasting, it shows me an error message like this. Though the button on some github repos is doing the same thing, like letting HA app grab the link automatically. I'm not sure what am I doing wrong here?